Resurfacing-tool.



J. H. RICHARDSON.

RESURFACING TOOL.

APPLICATION FILED DEC. 6, 1912.

1,083,297, Patented Jan. 6, 1914.

WT/VESAiK UNITED STATES PATENT oFFIoE.

oHmHAMDEN mozrmson, or MELROSE, MASSACHUSETTS, essrenon :ro umren SHOE=MAGHINEBY COMPANY, or PATERSON, unwonasny, A CQRIEOBATION or NEW IEBSEY.

BESURFAGING-TGOL.

--Speaifloetion 01E LetteraP-atent.

Patented Jan. 6,1914.

T ...e whqmg tmy canwm B- nknow nt a HN e ,--.ar .ti en .o heUni e esta e fl e dm a iMe mse, .i sth seeun y ofrMldd s n State of Massachusetts, have invented certai llmp remen in fie rt c rgr ao i wh m th t n o ieg(de rip ons? mmg Qn.--.ui. the a compan es; drawin s-a specificat o lik 'r fe eeq s hara te on h qdraw-i ig @ind ea ng -vl k ;,pa-r i th .sev ralrfigunes.

5'Ihe;ge1 aeral,pbject.pf the annexation s. ,to presid larla o x t l-Ja use 1n "f ing 11 smo t :an se e ,rsurtace tup n Wood .o other, mate i p fi wrs emgs e ',f?-C flith n ksc rr x-i an an on whic shall be more etficgient insactiolrthantoolsof simil r hanaat shithert emp it d- -.flTher oQLtha -illustr t s.th ;p e ernedembodimen ef th iins n ienrsms h forma atriaspwwhie is rm endedtpxlmar ystp -n i r ulted-essent a ist; b ek ssug a e r emp y d/imd erpsess s aud..-the=-hk b 9 obriouslyi .o ,gener -|nt1 1ty. a lfims eg tool, .esPe ie1 y.-. 0 P1ane.WQQdwa rta es- ,In th u t agfbleek re er edt n 1 porten st i erw rking surt h d be P rfect y pla and -fr deems m o lnnerenn ss Q -.,-any.1har t r, 1 Order 'tha -zth ld m tefiee almaysra ea u throng-hos i s At tery lcn t a i Ope io n ow ve y the; ade, t l di lS Q TCB a eppr tiabl distance n t e r l iace. o

therlblqck ;with -.t --I l1l tha th .la rarjd y-h ome qwom .se'asto ma e fac ng;necessary. .,;It been customary f l-gmploy fOIifthlS. purpose fi 11 p :h hmi teeth If distributed hegxularly in :the usual manner, overall 'pprtions.; f ,lts work ng face, and with a Working.member,..more 1 or er, extended to considerable. length, which isnecessary,to insure'theior nation of aperfectly plane surface. onjche working face of thelblook. It has been toun'd in.;pr act ce,

however, that in iew, of the hardness ofgt he material ofzthe. block, andtheafaot that its working urface is iorinedtaorqassathev grain, i i extr mely i f u t: to forc .into sueh material, the relatively large u ber f teet .Wit which a rasp. of ,the I usual :fOI'l'Il l i pro i e isufficient y. ,to mak t tool efiective on its gforward movement. The

tende ev .i if the. to qtolslip over.. h ,-sur'- face with but little 'abradinggefiect.

. Th prinqipa1 objec of 1tl1epresen U vent-ion is to avoid the difiioulty referred to andn vitb this in yiew .L have provided a tool whieh inits broadest aspectcomprises a uremlzyer hav ng a.;.-working-ace formed w r-sreup rabradi e ment t ere n alternatingwith blank ,portions between the er un e e bly i zt ge er dire io .of, f p,eratwe,. movement, of the top]. flhis top my presen wprk n m m e ufi oient mxtended or ss t-.- formation of 9 an eyen and rregular surface on the block Without being unduly difficult to operate in anwefliectiyemanper because of; the .great numb r of ab a in e em n s in action filenumber of; teetlrproyided may-be relatlvely small, and in the preferred construction is .-,,substantia1ly that of a ,toolof the us a orm ha ing; -W r face with. a area ha lflnsgreat. At the same time the n elha mp hhei is on ha c u d n b obtained Joy; merely-thinning out orv setting at wjder interyals theteeth; of arasp'forlned in. the -11S .al-., ay, -since it has ,been found therei era e-so, sen .tr te ,v ith th nu e e -itqe uflici t y-i e u e {for h p. .i v n is mpe ib eit sta the teeth in ,sucha mannenas to avoid the liability of thexgforrnation .pf ridges on the material gin-the .ggeration v of the tool. In

th -r 1 O my A ent m e g o p of 83 teeth, is a. unit. the elements of whichv may be asfine and closely arranged as desired. By this construction any desired degree of smoothness may be obtained, andssince the h ankp rti ns er -W th t g up of teeth. in-the general direction of operative movement of the,tool, there is no tendency to pass over portions of the surface of the material Without abrading efi'ect. .Suoh

efiecton the contrary is perfectly uniform 8 terially greater length than. width uand pre- 1 sen-t ng. a. g n ral y Pla rv wo k n face 2 upon which are arranged groupsof abrading elements 3 that alternate with blank portions 4 of the working face in the direction of the length of the working member. The abrading elements illustrated are in the form of teeth, which are arranged in staggered relation and may be as fine and closely set as desired, accordm to the character of the material to be wor ted: upon and the purpose in view;

The groups of teeth on the tool shown are in alinement in the direction of the length of the working member, but this is not essential, provided the groups are so arranged that in the o erative movement of the tool the surface 0 the material shall be abraded evenly without the formation of ridges. Nor is it necessary to employ abrading elements of the particular character illustrated, since the invention may be glven effect by the use of such elements in other forms.

The tool is provided with handles 5 and 6 secured to the plate 1 by screws, the heads of which lie in the blank portions of the working face.

In operation the workman grasps the handles and moves the tool forward in the customary manner in the general direction of the length of the working member with the working face adjacent to the surface of a cutting block or other object to be finished. The extension of the working member assures the formation of an even and regular surface while at the same time, as previously pointed out, the smaller relative number of teeth in action permits the tool to be used efiiciently for the purpose in view. The blank portions between the groups of teeth serve also as clearance spaces for the chips and dust, by which the latter find a ready exit, and this is a further important element in the increased efficiency over prior constructions.

It will be understood that the invention is not limited to a tool having a generally plane working face, since the face may have other regular forms in conformity to the regular contour of the particular surface to be finished. Nor is it essential that each group of teeth present the general outline of a rectangle as shown, since variations of this preferred arrangement may be adopted with good effect; and the relative extent of the groups of teeth with reference to the blank portions may be varied as desired.

Other modifications also within the spirit and scope of the claims will suggest themselves to those skilled in the art to which my invention relates.

Having described my invention, what .I claim and desire to secure by Letters Patent of the United States is the following:

1. A rasp having upon its working face distinct groups of abrading elements, said groulps being separated by-relatively large blan portions of the face, and each group comprising a plurality of abrading elements distributed over a substantial portion of the area of the face both longitudinally and transversely thereof.

2. A rasp having upon its working face distinct groups of abrading elements, said groups being arranged in succession in the direction of operative movement of the rasp and separated by blank portions of the face, the abrading elements of each group being distributed over successive units of area in ihe direction of operative movement of the ace.

3. A rasp comprising a member having a working face with groups of teeth on said face alternating wit blank portions between the groups, the teeth of each group being closel arranged and in staggered relation.

4. A rasp comprising a, member havinga working face with groups of teeth on said face alternating with blank portions between the groups, said groups being alined substantially in the direction of operative movement of the face and the teeth of each group arranged in staggered relation.

5. A finishing tool comprising a member having an extended working face of regular contour with distinct groups of abrading elements thereon, each of said roups constituting a rasp of the requisite degree of fineness and formed to act 11 on all portions of the surface of the work 1n the path thereof in the operative movement of the tool, successive groups in said direction of operative movement eing separated by relatively large blank ortions of the face of the tool.

6. A tool or finishing plane surfaces, comprising a member having a substantially plane working face with groups of abrading elements on said .face, said groups being separated by relatively large blank portions of the face that alternate therewith substantially in the direction of operative movement of the tool, and each group comprising a plurality of abrading elements projecting from the face and distributed over successive units of area thereof in said direction of operative movement.

7. A tool for finishing plane surfaces, comprising a member having a substantially plane working face of materiall greater length than width and arranged or operative movement substantially in the direction of its length, saidworking face having groups of abrading elements thereon, said groups being arranged in succession in the direction of the length of the face and separated by relatively large blank portions of the face, each group comprising a plurality of abrading elements distributed over the working face both longitudinally and transversely thereof.

8. A tool for finishing plane surfaces, comprising a member having a substantially In testimony whereof I have signed my plane working face of materially greater name to this specification in the presence of 10 length than width, and groups of teeth on two subscribing witnesses.

said face alternating with blank portions in the direction of the length of the face and JOHN HAMDEN RICHARDSON between the groups, said groups being alined Witnesses: the teeth of each group arranged in stag- HOWARD O. WINSLOW, gered relation. HARLOW M. DAVIS.

It is hereby certified that in Letters Patent N 0. 1,083,297, granted January 6, 1914, upon the application of John Hamden Richardson, of Melrose, Massachusetts, for an improvement in Resurfacing-Tools, an error appears in the printed specification requiring correction asfollows: Page 3, transpose lines 5 and 6; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 2nd day of June, A. D., 1914.

SEAL J". T. NEWTON,

Acting Commissioner of Patents. 

